Michael Caine as Harry Palmer

Karl Malden as Leo Newbigen

Ed Begley as General Midwinter

Oskar Homolka as General Stok

Françoise Dorléac as Anya

Guy Doleman as Colonel Ross

Vladek Sheybal as Dr. Eiwort

Milo Sperber as Basil

Janos Kurutz as Latvian Gangster

Alexei Jawdokimov as Latvian Gangster

Paul Tamarin as Latvian Gangster

Izabella Telezynska as Latvian Gangster

Mark Elwes as Birkenshaw

Stanley Caine as GPO Special Delivery Boy

Susan George as Russian Girl on Train

Miki Iveria as Russian Woman on Train

Jill Mai Meredith as Russian Girl on Train

John Brandon as Jim

Tony Harwood as Macey

Michael Stayner as Scientist

Donald Sutherland as Scientist at Computer

George Roubicek as Edgar

Brandon Brady as Chief of Security

Fred Griffiths as Taxi Driver

Gregg Palmer as 1st Dutch Businessman

John Herrington as 2nd Dutch Businessman

Hans De Vries as 3rd Dutch Businessman

Alex Marchevsky as Russian Radar Operator

Peter Forest as 2nd Russian Radar Operator

Reed De Rouen as Observer

Frederick Schrecker as Old Man on Train

Dolly Brennan as Old Woman in Gangster's Hut

Bill Mitchell as Guard at Midwinter's House

Max Kirby as Shoe Shop Assistant

Steve Emerson as Russian Plainclothesman

Mark Moss as Russian Plainclothesman

Gertan Klauber as Dr. Kaarna (uncredited)

Harry Fielder as Cowboy at Barndance (uncredited)